Former Penn State assistant football coach Jerry Sandusky briefly appeared in a Pennsylvania courtroom Thursday before the judge adjourned the hearing, saying that court decisions will be postponed because the grand jury investigation is still ongoing.

Pennsylvania Superior Court Judge John Cleland said deliberations Thursday would be "premature," after Sandusky's attorney called for child sex abuse charges to be dropped over a lack of more specific evidence regarding the alleged victims.

Sandusky, 68, a longtime defensive coordinator for the Nittany Lions, faces more than 52 counts involving sexual acts with 10 boys dating back to 1994. Prosecutors allege he met some of his accusers through Second Mile, a charity he created for underprivileged children.

"Second Mile, no matter what its purported purpose, was for the defendant, a victim factory, an assembly line for adolescent children to be abused, sodomized, (and) anally raped by this defendant," prosecutor Joseph McGettigan said.

Sandusky has pleaded not guilty and remains under house arrest until his trial begins June 5.

Ahead of Thursday's hearing, Sandusky's lawyers filed a 95-page motion on March 22 that addresses several issues:

-- The defense argues the allegations against Sandusky are so vague and nonspecific that he cannot prepare and present a defense, which violates his right to due process.